If you are not used to looking at MARC records, you may be confused by the different subfield delimiters. It is important to understand where the information in a subfield begins and also to be able to separate the subfield delimiter from the information there. Here is a brief discussion of definitions: http://lili.org/forlibs/ce/able/course8/06terms2.htm.
Note that many of the online catalogs do not indicate the subfield code a -- but the first entry in the field is always subfield code a unless otherwise indicated: 245 $a, for example
While we are looking at things, these records are all for the same book. Note the difference in the summary notes (520 $a) and also the subject headings (650 $a or 651 $a). For example, AMICUS doesn't use Harry Potter as a subject at all and the horrible SchoolCat record doesn't have any subject headings at all -- well, except for the 690 which is a local term -- (and, should have been in the 655 field anyway).
From Access Pennsylvania From AMICUS - The Canadian National Catalog
From Library of Congress From SchoolCat
Note that the record is not only terribly abbreviated but also Rowling's name is misspelled.
If you are not used to looking at MARC records, you may be confused by the different subfield delimiters. It is important to understand where the information in a subfield begins and also to be able to separate the subfield delimiter from the information there. Here is a brief discussion of definitions: http://lili.org/forlibs/ce/able/course8/06terms2.htm.
Note that many of the online catalogs do not indicate the subfield code a -- but the first entry in the field is always subfield code a unless otherwise indicated: 245 $a, for example
While we are looking at things, these records are all for the same book. Note the difference in the summary notes (520 $a) and also the subject headings (650 $a or 651 $a). For example, AMICUS doesn't use Harry Potter as a subject at all and the horrible SchoolCat record doesn't have any subject headings at all -- well, except for the 690 which is a local term -- (and, should have been in the 655 field anyway).
From Access Pennsylvania
From AMICUS - The Canadian National Catalog
From Library of Congress
From SchoolCat
Note that the record is not only terribly abbreviated but also Rowling's name is misspelled.